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Chemical looping: To combustion and beyond

Paper ID Volume ID Publish Year Pages File Format Full-Text
54132 46998 2014 10 PDF Available
Title
Chemical looping: To combustion and beyond
Abstract

•Chemical looping is a highly flexible platform technology for fuel processing well beyond combustion.•Chemical looping allows production of high purity hydrogen streams from H2O, activation of CO2, and efficient production of syngas via partial oxidation.•Appropriately designed “carrier” material are critical enablers for these processes.

Chemical looping combustion (CLC) is a rapidly emerging technology for clean combustion of fossil and renewable fuels which allows production of sequestration-ready CO2 streams with only minor efficiency penalties for CO2 capture. While initial interest in chemical looping was almost exclusively focused on combustion, we demonstrate here that the underlying reaction engineering principle forms a highly flexible platform for fuel conversion: Replacing air with steam or CO2 as oxidizer yields the chemical looping analogue to steam and dry reforming, resulting in the production of high purity hydrogen streams without the need for further clean-up steps and a novel route for efficient CO2 activation via reduction to CO, respectively. Furthermore, by controlling the degree of carrier oxidation, incomplete, i.e. partial oxidation of the fuel to synthesis gas is attained. Finally, appropriate selection of oxygen carrier materials even allows simultaneous desulfurization of the effluent stream, resulting in a strongly intensified process for highly efficient, low-emission conversion of S-contaminated fuel streams. Based on new results from our own research, the present paper presents a brief overview over the potential of chemical looping processes for methane conversion with a particular focus on the key role of engineered carrier materials as enablers for this class of processes.

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Keywords
Chemical looping; Process intensification; Natural gas hydrogen production; CO2 capture; CO2 activation; Syngas production nanomaterials
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 228, 1 June 2014, Pages 96–105
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us